[Retracted] Intelligent CO₂ Monitoring for Diagnosis of Sleep Apnea Using Neural Cryptography Techniques

Table 3

Evaluation of metric measures.

	Train			Test
	GA [32]	GEP	GEP-KNN	GA	GEP	GEP-KNN
Correlation coefficient	0.8911	0.9443	0.9751	0.8911	0.9643	0.9951
Root mean square	7.4562	6.4185	5.3452	12.4551	16.6792	11.3452
Mean relative error	6.4597	4.6575	3.893	13.4563	6.5789	4.3678
Bias	-0.4522	-1.5482	-1.3793	-4.5824	3.4566	2.4367